Pneumatic-despatch-tube apparatus.



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PNEUMATIG-DESPATOH TUBE APPARATUS. APPLIOATION FILED JUNE 11, 1906. RENEWEDMAY 11, 1910.

962,854. Patented June 28,1910.

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A. W. PEARSALL. PNEUMATIC DESPATGH TUBE APPARATUS. APPLICATION FILED JUNE 11, 1906. REFBWED my 11, 1910. 7 962,854, Patented June 28, 1910.

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PNEUMATIC DESPATOH TUBE APPARATUS.

APPLICATION FILED JUNE 11, 1906. RENEWED MAY 11, 1910.

Patented June 28, 1910.

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UNITED STATES PATENT ()FFICE.

ALBERT W. IPEARSALL, OF LOWELL, IVIASSACHUSETTS, ASSIGNOR TO LAMSOIST CONSOLI- DATED STORE SERVICE COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PNEUMIATICDESPATGHTUBE APPARATUS.

Application filed June 11, 1906, Serial No. 321,151.

To all whom it may concern:

Be it known that I, ALBERT W. PEARSALL, of Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Pneumatic-Despatch-Tube Apparatus, of which the following is a specification.

My invention relates to improvements in pneumatic despatch tube apparatus and particularly to that class in which a fluid under pressure is used to create a vacuum for the transmission of carriers.

The objects of my invention are to effect the transmission of carriers by the use of a primary fluid under pressure to create a vacuum and thereby establish a secondary or transmitting force. Economy of. power is secured by automatically limiting the action of the primary fluid pressure to accomplish the proper transmission and delivery of carriers throughout the system.

In the accompanying drawings are shown two forms of construction embodying my invention in which Figure 1 shows the general arrangement of a pneumatic tube system in operating connection with a source of water pressure for generating a transmitting force for said system. Fig. 2 is a sectional view of a part of Fig. 1 showing mechanism for establishing and limiting the operation of the primary fluid pressure. F ig. 3 is a front elevation of the mechanism shown in Fig. 2. Fig. A is a bottom plan view of Fig. 3. Fig. 5 is a modification showing a source of steam pressure adapted to be substituted for the water pressure shown in Fig. 1.

Like letters of reference refer to like parts throughout the several views.

Referring to Fig. 1, A represents a transmission tube connecting the despateh inlet A with the receiving terminal A of ordinary construction. Connecting the said terminal A with the transmission tube B is the by-pass A which is fitted with a despatching inlet A. The transmission tube B at the opposite end is connected with the receiving terminal B and with the inspirator C by means of tube B The inspirator G is connected with the high pressure tank D by means of pipe O. Pressure is maintained in tank D by means of pump D connected therewith by pipe D OXQlilOW tank E is connected by pipe E with pump D and supplies water thereto.

Specification of Letters Patent.

Patented June 28, 1910.

Renewed May 11, 1910. Serial No. 560,726.

The pipe C is fitted with a nozzle C at one end and directly opposite the aperture of said nozzle is mounted the cone U which is adjustably held in the overflow tank E. Surrounding the nozzle C and cone C is the inclosed inspirator case G which has the exhaust pipe C connected therewith and adapted to discharge into tank E. Balance valve F controls the pipe C intermediate the inspirator C and tank D. The lever F adapted to operate said valve is mounted at one end in the slotted member F attached to the piston rod F (see Figs. 2 and 3) which carries piston F t mounted in cylinder F, the lower cylinder head F being connected with the twoway valve G by passage F the lower part of said valve Gr being connected with the exhaust pipe G emptying into overflow tank E and controlled by timing valve G Connecting the upper part of valve G with ordinary Water pressure is the pipe G controlled by valve G (see Fig. 1).

Mounted on rod H in the cylinder of valve G are pistons H and H controlling respectively passages G and G Attached to rod H is armature H which is adapted to be operated by magnet H which is attached to extension J of cylinder F The upper portion of rod H is reciprocally mounted in eX- tension J and carries the crosshead H which is connected with the bell-crank lever J by pin J 2 mounted in slot J Lever J is pivoted to the upper cylinder head F at J*. The slotted member F carries the cam projection J 5 adapted to engage the upper end of the bell lever J. The push button X at the inlet A and the button Z at the inlet A are connected with the magnet H by wires X and L, respectively, and with the battery Y by Wires X and L said battery being connected with the magnet H by wire H.

In the modification, Fig. 5, the inspirator c is operated by steam supplied from the boiler cl through the pipe 0 and ejected from the nozzle 0 The exhaust is discharged through the pipe 0 thence into the pipe 6 connected therewith. The flow of steam through the pipe 0 is controlled by an ordinary valve cl and by the automatic valve f which is operated by the water pressure timing mechanism shown in Figs. 2 and 3.

The operation is as follows: If it is desired to despatch a carrier from the inlet A to the terminal A the button X is pressed completing the circuit with the magnet H" which attracts the armature I-I" attached to the rod H which raises the pistons H and to the position as shown in dotted lines Fig. 2, opening the passage Gr and closing the pas sage G at the same time throwing the bell crank lever J to the position shown by dotted lines. The opening of passage G permits the entrance of water into the passage F 7 which enters the cylinder F driving the piston F upward causing the slot-ted member I to engage the bell lever J torcing it to its original position thus causing the closure of the passage G and cutting ott the flow of water. In the meantime, the lower portion of the slot F engages and lifts the lever F opening the balance valve F admitting high pressure water from the tank D into the nozzle C of the inspirator C, the water being deflected by the cone G into the pipe C" and thence into tank E and creating a flow of air in the pipe B in the direction shown by the arrow, thereby transmitting the carrier and discharging the same at the terminal A In the meantime the passage G being closed as hereinbet'ore described, the passage G being simultaneously opened, permits the escape of water from the cylinder F 5 through the passage F and pipe G into the tank E, the escape of water being controlled by the valve G; with the escape of the water, the piston F descends carrying the slotted member F until it reaches the normal position when the upper end of the slot F engages the lever F closing the valve F and shutting off the flow of high pressure water and the flow of air in the transmission tube. The valve G is adapted to be set to time the escape of water in the cylinder F thereby limiting the duration of operation of the inspirator G in proportion to the proper transmission and delivery of the carrier.

The operation in despatching a carrier from the inlet A to the terminal B is identical with that above described except that the button Z is used to complete the circuit and energize the magnets Hf.

Having thus described the nature of my invention and set forth a construction embodying the same, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a pneumatic despatch tube apparatus, an inspirator, fluidoperated means controlling the action of such inspirator, means controlling the flow of fluid to said fluidoperated means, electrically operated devices for putting in operation said controlling means, and devices operated by the fluidoperated means for actuating said controlling means to permit the escape of fluid from said fluid-operating means.

2. In a pneumatic despatch tube apparatus, an inspirator, fluid-operated means controlling the action of such inspirator, means controlling the flow of fluid to said fluidoperated means, electrically-operated devices for putting in operation said controlling means, devices operated by the fluid-operated means for actuating said controlling means to permit the escape of fluid from said fluidoperating means, and means for timing the escape of such fluid.

3. In a pneumatic despatch tube appara tus, an inspirator, fluid-operated means controlling the action of such inspirator, means controlling the flow of fluid to said fluidoperated means, electrically-operated devices for putting in operation said controlling means, devices operated by the fluid-operated means for actuating said controlling means to permit the escape of fluid from said fluid operating means, means for timing the escape of such fluid, and means for returning the exhaust from said inspirator to the source of hydraulic pressure.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses, this 29th day of day A. D. 1906.

ALBERT WV. PEARSALL. Vitnesses A. LARRABEE, A. L. Mnssnn. 

